The Fundamental Ideas in Chemistry Flashcards
What do atoms of the same element have the same number of?
Protons
What is the relative charge of each of the atomic particles?
Proton +1
Neutron 0
Electron -1
What does the electron configuration tell us?
How the electrons are arranged around the nucleus in energy levels or shells
How many electrons can the first shell hold?
2
After the first shell, how many electrons can the shells hold?
8
Does the energy of the shells increase or decrease as it becomes further away from the nucleus?
Increase
Oxygen has 8 electrons. What would be the electron configuration?
2, 6
How is the periodic table arranged?
In the same group have same number of electrons in outer shell
Increasing atomic number
Period number corresponds to number of shells
Why do the alkali metals have similar properties?
Their atoms have the same number of electrons in the outer shell
What sort of bonds are formed with alkali metals?
Ionic compounds
What do alkali metals produce when reacting with water?
Metal hydroxide
Hydrogen
What do alkali metals produce when reacting with oxygen?
Metal oxide
Why are noble gases unreactive?
They have a stable electron arrangement
What is a mixture?
Two or more elements that are not chemically combined
Properties remain specific to each substance
What is a compound?
Two or more elements that are chemically combined,
They are held together by chemical bonds
